package com.woniuxy.service.impl;

import com.woniuxy.dao.OrderDao;
import com.woniuxy.entity.Order;
import com.woniuxy.entity.Product;
import com.woniuxy.entity.utils.ResponseEntity;
import com.woniuxy.service.OrderService;
import org.apache.commons.beanutils.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.client.RestTemplate;

import java.lang.reflect.InvocationTargetException;
import java.util.Map;

/**
 * @Author: 邓宇昂
 * @Do: 订单的服务层
 * @DateTime: 22/05/30/0030 下午 12:06
 * @Component: 成都蜗牛学苑
 **/
//@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    OrderDao orderDao;

    @Override
    public Order addOne(Order order) {
        return  orderDao.save(order);
    }

    @Override
    public ResponseEntity generateOrder(Integer pid, Integer num) {
        //使用入门的微服务调用方案
        RestTemplate restTemplate = new RestTemplate();
        ResponseEntity productResp = restTemplate.getForObject("http://localhost:8081/product/" + pid, ResponseEntity.class);

        //写业务代码
        Product product = new Product();

        //处理如果获取不到数据
        if (Integer.parseInt(productResp.get(ResponseEntity.ResponseStatus.CODE.value()) +"") == HttpStatus.INTERNAL_SERVER_ERROR.value()) {
            return productResp;
        }
        Map map = (Map) productResp.get(ResponseEntity.ResponseStatus.DATA.value());

        try {
            //想办法把LinkedHashMap转换为Product对象
            BeanUtils.populate(product,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

        Order order = new Order();
        //用户信息假数据
        order.setUid(1);
        order.setUsername("tom");
        order.setPid(product.getPid());
        order.setPname(product.getName());
        order.setPrice(product.getPrice());

        //存储购买的数量
        order.setNumber(num);
        Order returnOrder = null;
        //如果订单入库成功，应该扣减库存
        if (product.getStock()-num>=0) {//商品扣减后必须大于等于0才能够扣减商品
            returnOrder = orderDao.save(order);
            product.setStock(product.getStock()-num);
            restTemplate.put("http://localhost:8083/product/", product);
        }else{
            return new ResponseEntity(HttpStatus.NOT_MODIFIED.value(),"商品卖完了。");
        }
        return new ResponseEntity(returnOrder);
    }
}
